Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for Footways
The linear economy paradigm in place to date has to be seriously challenged to give way to a new school of thought known as the circular economy. In this research work, precast kerbs and paving blocks made with recycled concrete (RACC-mixture) bearing 50 wt% mixed recycled aggregate (masonry content...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/22/7007 |
| _version_ | 1797509517713342464 |
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| author | Andrés Juan-Valdés Desirée Rodríguez-Robles Julia García-González María Isabel Sánchez de Rojas Manuel Ignacio Guerra-Romero Rebeca Martínez-García Julia M. Morán-del Pozo |
| author_facet | Andrés Juan-Valdés Desirée Rodríguez-Robles Julia García-González María Isabel Sánchez de Rojas Manuel Ignacio Guerra-Romero Rebeca Martínez-García Julia M. Morán-del Pozo |
| author_sort | Andrés Juan-Valdés |
| collection | DOAJ |
| description | The linear economy paradigm in place to date has to be seriously challenged to give way to a new school of thought known as the circular economy. In this research work, precast kerbs and paving blocks made with recycled concrete (RACC-mixture) bearing 50 wt% mixed recycled aggregate (masonry content of 33%) and an eco-efficient cementitious material as 25 wt% conventional binder replacement were evaluated to assess their intrinsic potential to replace traditional raw materials, in keeping with circular economy criteria. Therefore, precast products were subjected to mechanical strength, durability and microstructure tests and were compared to conventional concrete units (CC-mixture and commercially available precast elements). Although a class demotion was observed for water absorption and some decreases in flexural strength (26%), splitting tensile strength (12.8%) and electrical resistivity (45%) and a lower class water absorption were registered, and the recycled mixture also exhibited a greater performance in terms of compressive strength (6%), a better abrasion resistance classification and a comparable porosity and microstructure, which ensures a good concrete durability. In any case, the results showed that precast pieces were European standard-compliant, thus supporting the viability of the mixed recycled aggregates and eco-efficient cementitious replacement in footways. |
| first_indexed | 2024-03-10T05:18:53Z |
| format | Article |
| id | doaj.art-809a427ad34e42e49a0022fdc0aa66bb |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:18:53Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-809a427ad34e42e49a0022fdc0aa66bb2023-11-23T00:12:20ZengMDPI AGMaterials1996-19442021-11-011422700710.3390/ma14227007Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for FootwaysAndrés Juan-Valdés0Desirée Rodríguez-Robles1Julia García-González2María Isabel Sánchez de Rojas3Manuel Ignacio Guerra-Romero4Rebeca Martínez-García5Julia M. Morán-del Pozo6Department of Agricultural Engineering and Sciences, University of León, Av. Portugal 41, 24071 León, SpainDepartment of Agronomy and Forestry Engineering, University of Extremadura, Av. Adolfo Suárez, s/n, 06007 Badajoz, SpainDepartment of Agricultural Engineering and Sciences, University of León, Av. Portugal 41, 24071 León, SpainEduardo Torroja Institute for Construction Science, Serrano Galvache 4, 28033 Madrid, SpainDepartment of Agricultural Engineering and Sciences, University of León, Av. Portugal 41, 24071 León, SpainDepartment of Mining Technology, Topography and Structures, University of León, Campus de Vegazana s/n, 24071 León, SpainDepartment of Agricultural Engineering and Sciences, University of León, Av. Portugal 41, 24071 León, SpainThe linear economy paradigm in place to date has to be seriously challenged to give way to a new school of thought known as the circular economy. In this research work, precast kerbs and paving blocks made with recycled concrete (RACC-mixture) bearing 50 wt% mixed recycled aggregate (masonry content of 33%) and an eco-efficient cementitious material as 25 wt% conventional binder replacement were evaluated to assess their intrinsic potential to replace traditional raw materials, in keeping with circular economy criteria. Therefore, precast products were subjected to mechanical strength, durability and microstructure tests and were compared to conventional concrete units (CC-mixture and commercially available precast elements). Although a class demotion was observed for water absorption and some decreases in flexural strength (26%), splitting tensile strength (12.8%) and electrical resistivity (45%) and a lower class water absorption were registered, and the recycled mixture also exhibited a greater performance in terms of compressive strength (6%), a better abrasion resistance classification and a comparable porosity and microstructure, which ensures a good concrete durability. In any case, the results showed that precast pieces were European standard-compliant, thus supporting the viability of the mixed recycled aggregates and eco-efficient cementitious replacement in footways.https://www.mdpi.com/1996-1944/14/22/7007recycled cementmixed recycled aggregatesrecycled concreteprecast concretefootways |
| spellingShingle | Andrés Juan-Valdés Desirée Rodríguez-Robles Julia García-González María Isabel Sánchez de Rojas Manuel Ignacio Guerra-Romero Rebeca Martínez-García Julia M. Morán-del Pozo Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for Footways Materials recycled cement mixed recycled aggregates recycled concrete precast concrete footways |
| title | Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for Footways |
| title_full | Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for Footways |
| title_fullStr | Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for Footways |
| title_full_unstemmed | Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for Footways |
| title_short | Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for Footways |
| title_sort | recycled precast concrete kerbs and paving blocks a technically viable option for footways |
| topic | recycled cement mixed recycled aggregates recycled concrete precast concrete footways |
| url | https://www.mdpi.com/1996-1944/14/22/7007 |
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